Full-Stack Developer for AI-Powered Internal Tools

Merkle Nederland; Rotterdam; On-site; EUR 65,000 - 90,000; Full time

Benefits offered by this job

Hybrid work model

Well-being days

Social Impact Days

Learning & development

Job summary

Merkle Nederland is seeking a hands-on Full-Stack Developer to build and scale internal tools and AI-powered applications. You will own the end-to-end app layer, from backend logic to frontend interfaces, including authentication, deployments, and stability.

The role is based in Rotterdam and offers a fixed-term, full-time contract with a hybrid work model and competitive benefits. You will collaborate with the AI/LLM team to integrate model outputs into the product.

Qualifications

• 3+ years of software engineering experience.
• Experience with modern JS/TS stacks (React, Next.js, Node.js) for frontend and backend.
• Experience with self-hosted infrastructure and Docker.
• Knowledge of multi-tenant application patterns.

Responsibilities

• Own the full application stack from backend to frontend.
• Design authentication and access controls, including multi-tenant isolation.
• Build serverless backend functions and CI/CD pipelines.
• Develop modern frontend with React and TypeScript.
• Collaborate with AI/LLM teams to integrate model outputs.

Skills

Full-stack software engineering

Ownership mindset

Problem-solving

Tools

Docker

Job description

Merkle Nederland is seeking a hands-on Full-Stack Developer to build and scale internal tools and AI-powered applications. You will own the end-to-end app layer, from backend logic to frontend interfaces, including authentication, deployments, and stability.

The role is based in Rotterdam and offers a fixed-term, full-time contract with a hybrid work model and competitive benefits. You will collaborate with the AI/LLM team to integrate model outputs into the product.